CN2605395Y

CN2605395Y - Intake manifold structure for multi cylinder internal combustion engine

Info

Publication number: CN2605395Y
Application number: CNU032335873U
Authority: CN
Inventors: 朱絮飞; 刘伦; 张劲松
Original assignee: Changan Automobile Group Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2003-03-17
Filing date: 2003-03-17
Publication date: 2004-03-03
Anticipated expiration: 2013-03-17

Abstract

The utility model relates to an intake manifold structure of a multi-cylinder internal-combustion engine, and the intake manifolds which are connected out from a resonator are connected with a cylinder cap of the internal-combustion engine respectively, and the design of the intake manifolds has each independently equal length and symmetrical steel pipes which are bend-forming through the space, and the steel pipes of the intake manifolds are stainless pipes or galvanized steel pipes. The structure has the advantages of that the equal length and symmetrical stainless pipes are used to satisfy the design principles of the intake manifold and the air uniformity in each cylinder can be guaranteed; and the design freedom is so high that the design process can be simplified; and the time of trial production is short and the cost is low, of which is beneficial to optimize the design proposal; and the combination can be better if the utility model can be welded by connecting with steel pipes or the punched resonator as well; and the pipe diameter change of each air flue can easily satisfy the size requirement through enlarging pipes, of which can reach the effect of moulding the same intake manifolds.

Description

The intake manifold structure of internal-combustion engine with multi-cylinders

Technical field

The utility model belongs to technical field of internal combustion engines, the intake manifold structure of a kind of internal-combustion engine with multi-cylinders of specific design.

Technical background

Bulk limits existing multi-cylinder engine intake manifold and the contradiction of casting mould die sinking direction in order to be in harmonious proportion in design process, is difficult to design the gas exhaust manifold that satisfies intake manifold design principle (isometric, symmetry); The material of casting intake manifold is grey cast iron or spheroidal graphite cast iron, and wall thickness is at 3.5-4.5mm, Heavy Weight; Existing multi-cylinder engine intake manifold structure as seen from Figure 1, in order to guarantee to install, intake manifold has to be designed to not isometric structural type, like this, the cylinder uniformity of air-flow can not get good assurance, influence in the cylinder evenly to burn.

Summary of the invention

The purpose of this utility model is at the prior art above shortcomings, a kind of intake manifold structure of multi-cylinder engine of new structure is provided, can satisfy the isometric or symmetry principle of intake manifold design, guarantee the airflow homogeneity in each cylinder, solve the problem of the existence of prior art.

The technical solution adopted in the utility model is as follows:

The intake manifold structure of internal-combustion engine with multi-cylinders, intake manifold is picked out by resonant cavity, taps into the cylinder head of internal-combustion engine respectively, and intake manifold is designed to independently isometric, symmetrical separately steel pipe, bends moulding through the space.

The steel pipe that described intake manifold adopts is Stainless Steel Tube or Coating Steel Pipe.

The advantage of said structure is conspicuous: adopting isometric, symmetrical Stainless Steel Tube or Coating Steel Pipe is that intake manifold satisfies the intake manifold design principle, can guarantee the airflow homogeneity in each cylinder, because the Stainless Steel Tube steel pipe is to bend moulding in the space, just need not consider the restriction of casting mould die sinking direction, each cylinder tracheae of design intake manifold under spatiality, design freedom is high, and design process is simplified, and the isometric or symmetrical space with steel pipe of intake manifold is curved satisfies; Simultaneously, in the development and Design of intake manifold, stainless steel or Coating Steel Pipe space bend the intake manifold trial-production time of moulding short, cost is low, exemplar production time is short, can make a plurality of design proposals simultaneously and participate in test, helps optimizing design scheme; Intake manifold can with equally by steel pipe or stamping forming resonant cavity by being welded to connect, in conjunction with better; In addition, the variation of the caliber of each air flue is easy to satisfy size requirement by expander, reaches the identical effect of casting intake manifold.

Description of drawings

Fig. 1 is the intake manifold structural drawing of existing internal-combustion engine with multi-cylinders;

Fig. 2 is the intake manifold structural drawing of internal-combustion engine with multi-cylinders of the present utility model;

Embodiment

Referring to Fig. 2, intake manifold 2 one ends of internal-combustion engine with multi-cylinders intake manifold structure and resonant cavity 1 welding, to introduce through resonant cavity 1 from the fresh air of solar term, intake manifold 2 is independently isometric, symmetrical Stainless Steel Tube or Coating Steel Pipe separately, bend moulding through the space, the other end taps into cylinder head 3 respectively, and fresh air is imported the cylinder head air flue equably, and with enter the cylinder cover chamber ignition after the fuel oil mist of oil of oil nozzle ejection evenly mixes.

Claims

1, the intake manifold structure of internal-combustion engine with multi-cylinders, intake manifold is picked out by resonant cavity, taps into the cylinder head of internal-combustion engine respectively, it is characterized in that intake manifold is independently isometric, symmetrical separately steel pipe, bends moulding through the space.

2, the intake manifold structure of internal-combustion engine with multi-cylinders according to claim 1 is characterized in that the steel pipe that intake manifold adopts is Stainless Steel Tube or Coating Steel Pipe.